JPS59104107A - Gas insulated transformer - Google Patents
Gas insulated transformerInfo
- Publication number
- JPS59104107A JPS59104107A JP21429082A JP21429082A JPS59104107A JP S59104107 A JPS59104107 A JP S59104107A JP 21429082 A JP21429082 A JP 21429082A JP 21429082 A JP21429082 A JP 21429082A JP S59104107 A JPS59104107 A JP S59104107A
- Authority
- JP
- Japan
- Prior art keywords
- transformer
- radiator
- gas
- radiators
- gas insulated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/20—Cooling by special gases or non-ambient air
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformer Cooling (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、室内に設置するガス絶縁変圧器の放熱器の
絶縁ガス側および空気側の熱伝達率を増大して冷却効果
を大幅に向上させるものである。DETAILED DESCRIPTION OF THE INVENTION The present invention significantly improves the cooling effect by increasing the heat transfer coefficient on the insulating gas side and the air side of a radiator of a gas insulated transformer installed indoors.
この種の変圧器の冷却は、一般に自冷式放熱器を用いて
騒音発生を防止することが望ましく、また、放熱器は冷
却効果を高くして放熱面積または単位数量を減少し、変
圧器全体の床面、＠をできるだけ縮小することが望まれ
る。For cooling this type of transformer, it is generally desirable to use a self-cooling type radiator to prevent noise generation, and the radiator increases the cooling effect and reduces the heat radiation area or unit quantity, and the entire transformer It is desirable to reduce the floor surface of @ as much as possible.
従来のこの種変圧器の構造および変圧器室の換気設備は
、第１図および第２図に示すとお９である。変圧器タッ
ク１の中に巻線２および鉄心６を収容して絶縁ガス４が
封入されている。符号５は高圧側シツシング、６け低圧
ｆ＃！Ｉブッシングをそれぞれ示し、タンク１の側面壁
からそれぞれ高圧側および低ＩＦ側の引出線を外部端子
５ａ 、 ６ｋ）に導出して、該外部端子５ａ、６ａＶ
Ｃ接続したリード線（図示せず〕は、それぞれブスダク
ト７ ａ、７：ｂ内に配設している。この変圧器タンク
１の側面壁には、自冷式放熱器８が複数個取ｐ付けであ
る。The conventional structure of this type of transformer and the ventilation equipment of the transformer room are as shown in FIGS. 1 and 2. A transformer tack 1 houses a winding 2 and an iron core 6, and is filled with an insulating gas 4. Code 5 is high pressure side shushing, 6 low pressure f#! I bushings are respectively shown, and the high pressure side and low IF side lead wires are led out from the side wall of the tank 1 to external terminals 5a, 6k), respectively, and the external terminals 5a, 6aV
C-connected lead wires (not shown) are arranged in the bus ducts 7a and 7:b, respectively.A plurality of self-cooling type radiators 8 are installed on the side wall of the transformer tank 1. It is attached.
該放熱器８けＪ：部および下部のヘッダに中空パネルを
並列に接続した構造であり（何れも図示せ楓その上部接
続管８ａと下部接続管８ｆ）とを変圧器タンク１の側面
壁に連結して、変圧器タンク１と一体となって支持され
ている。The radiator has a structure in which hollow panels are connected in parallel to the header and the lower header (upper connecting pipe 8a and lower connecting pipe 8f, both shown) are connected to the side wall of the transformer tank 1. They are connected and supported integrally with the transformer tank 1.
上記の変圧器が設置された変圧器室ＩＵ［Ｊには、その
隔壁１０１に換気扇１０２を設けた換気口１０６が開設
されていて、該換気口ＩＤ６ＶＣは。In the transformer room IU[J where the above transformer is installed, a ventilation port 106 equipped with a ventilation fan 102 is provided in the partition wall 101, and the ventilation port ID6VC is.
変圧器全体の床面積と同等の９１１口部で変圧器の上方
を覆って吊架した遮蔽フード１０５が通気ダクト１０６
を介して連結されている。A ventilation duct 106 has a shielding hood 105 suspended above the transformer at the 911 opening, which is equivalent to the floor area of the entire transformer.
are connected via.
この変圧ＲＨの巻１ｇ２および鉄心６から発生した損失
熱は、タンク１内の絶縁ガス４に伝達され。The heat loss generated from the winding 1g2 of the transformer RH and the iron core 6 is transferred to the insulating gas 4 in the tank 1.
温度差による自然対流によって上昇した絶縁ガス４が放
熱器８の上部接続管８ａから放熱器８内に導かれ、放熱
器８を構成する中空パネルの放熱面（表面〕から変圧器
室１（ＪＯ内に熱を放散して冷却されたのち、下部接続
管８ｊ）を経てタンク１に戻る循環作用を繰Ｑ返して変
圧器を冷却する。The insulating gas 4 that has risen due to natural convection due to the temperature difference is guided into the radiator 8 from the upper connection pipe 8a of the radiator 8, and is then introduced into the transformer chamber 1 (JO After being cooled by dissipating heat into the tank 1, the transformer is cooled by repeating the circulation process Q in which it returns to the tank 1 via the lower connecting pipe 8j).
変圧器室１００内の空気は、換気扇１０２によって矢印
で示すように遮蔽フード１０５に導入して％遮蔽フード
１０５から通気ダクト１０６を経て換気口１（Ｊ６に吸
引し、換気口１０３から室外に放出することにより、変
圧器室１００の通風冷却を行なっている。The air in the transformer room 100 is introduced into the shielding hood 105 by the ventilation fan 102 as shown by the arrow, and is sucked from the shielding hood 105 through the ventilation duct 106 into the ventilation opening 1 (J6), and is discharged to the outside from the ventilation opening 103. By doing so, the transformer room 100 is cooled by ventilation.
しかしながら、従来の迦蔽フード１０５は、その開口部
の下端縁と放熱器８の土面との間に大きな間隔をおいて
吊架されているため、換気扇１０２によって趣蔽フード
１０５に導入される空気のうち、その一部が主として放
熱器８の放熱面の上部と接触して通過するにすぎず、こ
のような通気経路では放熱器８の放熱面における空気側
の熱伝達率の低下を免れず、冷却効果が劣る欠点があっ
たさらに、絶縁ガスを自然対流させる変圧器において、
絶縁ガス７５に温度差によって自然対流するときの速度
は、放熱器の中心高さく冷却中心高さ）と巻線および鉄
心の中心高さく発熱中心高さ〕との差に比例し１巻線お
よび鉄心の表面の熱伝達率は、絶縁ガスの自然対流速度
に比例することが知られているが、従来の変圧器の冷却
中心高さと発熱中心高さとの差は小ざなものであるため
、絶縁ガス側の熱伝達率の増大にも限界があり、空気１
則の熱伝達率の低下と相゛まって放熱器の冷却効果はさ
らに低減するという欠点があった。However, since the conventional ventilation hood 105 is suspended with a large distance between the lower edge of its opening and the soil surface of the radiator 8, the ventilation fan 102 is introduced into the ventilation hood 105. Only a part of the air mainly passes through in contact with the upper part of the heat radiating surface of the radiator 8, and in such a ventilation path, a decrease in the heat transfer coefficient on the air side of the heat radiating surface of the radiator 8 is avoided. In addition, in transformers that allow natural convection of insulating gas,
The speed of natural convection in the insulating gas 75 due to the temperature difference is proportional to the difference between the center height of the radiator (the height of the cooling center) and the center height of the winding and the iron core (the height of the heating center). It is known that the heat transfer coefficient on the surface of the iron core is proportional to the natural convection velocity of the insulating gas, but since the difference between the height of the cooling center and the height of the heating center of a conventional transformer is small, There is a limit to the increase in heat transfer coefficient on the gas side, and air 1
This has the disadvantage that the cooling effect of the radiator is further reduced as a result of the reduction in the heat transfer coefficient.
また、一般に、自冷式ガス絶縁変圧器においては、冷媒
ガスの冷却性能の点から変圧器容量が犬−３〜
きくなると、放ｉ器の設置数を増加するか、あるい１は
冷却扇を附設して風冷式としなければならないが、放熱
器を増設することは変圧器全体が大型となって設置床面
積に制約のある室内には設置できず、風冷式にすること
は騒音防１１二上好ましくないという問題があった。In addition, in general, in self-cooling gas insulated transformers, when the transformer capacity increases from the point of view of the cooling performance of the refrigerant gas to -3 or more, the number of radiators installed must be increased, or the number of cooling fans must be increased. However, adding a radiator would make the entire transformer large, making it impossible to install it indoors where floor space is limited, and using a wind-cooled system would result in noise. There was a problem that defense 11 and 2 were unfavorable.
この発明は、上記の欠点を除去して、ガス絶縁変圧器の
自冷式放熱器の絶縁ガスイ１１０および空気側における
熱伝達率を高くして冷却効果を大幅（で向上させ、室内
設置用として好適な低騒音、かつ床面積の小さなガス絶
縁変圧器を提供することを目的とする。This invention eliminates the above-mentioned drawbacks, increases the heat transfer coefficient in the insulating gas I 110 and the air side of the self-cooling radiator of a gas insulated transformer, greatly improves the cooling effect, and makes it suitable for indoor installation. The purpose of the present invention is to provide a gas insulated transformer that has suitable low noise and a small floor space.
以下、この発明の実施例について５図面を参照して説明
する。Embodiments of the present invention will be described below with reference to five drawings.
第３図は、この発明の実施例を示す縦断面図であシ、変
圧器タンク１０の上面壁１０ａの中央に上昇ガス管７１
を鉛直方向に分岐させて複数個設け、該上昇ガス管１１
の上端に」二部ヘッダー管１２を水平方向にして接続す
る。変圧器タンク１０の対向する側面壁１０′ｂ、Ｉ
Ｌｌｃの下端部から下降４−
ガス管１３．１４をｍ直方向に分岐させて、上記上昇ガ
ス管１１と同一の対称位置に複数個設けて、該下降ガス
管１６．１４の上端にそれぞれ下部ヘッダー管１６．１
８を水平方向ＩＣＬで接続する。FIG. 3 is a longitudinal sectional view showing an embodiment of the present invention, in which a rising gas pipe 71 is provided in the center of the upper wall 10a of the transformer tank 10.
A plurality of rising gas pipes 11 are provided by branching in the vertical direction.
A two-part header pipe 12 is connected horizontally to the upper end of the pipe. Opposing side walls 10'b, I of the transformer tank 10
A descending 4-gas pipe 13.14 is branched in the vertical direction from the lower end of the Llc, and a plurality of descending gas pipes 13.14 are provided at the same symmetrical positions as the above-mentioned ascending gas pipe 11. Header pipe 16.1
Connect 8 with horizontal ICL.
上記の上昇ガス管１１および下降ガス管１６゜１４と変
圧器タンク１０の上面壁１０ａおよびＩｌＯ面壁ＩＤｂ
、ＩＤｃとの接続、ならびに上昇ガス管１１と上部ヘッ
ダー管１２との間、および下降ガス管１３．１４と下部
ヘッダー管１６．１８との間の接続は、何れも図示しな
いフランジによジ着脱自在となっている。The above-mentioned ascending gas pipe 11 and descending gas pipe 16° 14, the top wall 10a of the transformer tank 10, and the IIO surface wall IDb
, IDc, and the connections between the ascending gas pipe 11 and the upper header pipe 12, and between the descending gas pipe 13.14 and the lower header pipe 16.18, are all connected using flanges (not shown). It is free.
変圧器タンク１０の上面壁１０ａの上方には、上部ヘッ
ダー晋１２の左右両側に複数個の自冷式放熱器８０を対
向させて並列に配置して、該放熱器８０の上部接続管８
Ｕａと下部接続管８０ｂとを、それぞれ上部ヘッダー晋
１２と下部ヘッダー晋１６．１８とに図示しない７ラン
ジを介して着脱自在に接続する。Above the upper wall 10a of the transformer tank 10, a plurality of self-cooling type radiators 80 are arranged in parallel and facing each other on both the left and right sides of the upper header 12.
Ua and the lower connecting pipe 80b are removably connected to the upper header 12 and the lower header 16, 18, respectively, via seven flanges (not shown).
かくして、複数個の放熱器８Ｄが、変圧器タンク１０の
上面壁１０ａの上方で、上部ヘッダー管１２と下部ヘソ
グー管１６．１８とに支持されて配置されることになる
が、必要に応じて上面壁１０ａとの間に支持台を載１＾
′してもよく、丑た、上昇ガス・を１１との間に適宜の
ＩＩ・１定部材を介在させて、該固定部材を放熱器８０
と上昇ガス管１１とに溶接して支持してもよい。In this way, a plurality of radiators 8D are disposed above the top wall 10a of the transformer tank 10, supported by the upper header pipe 12 and the lower header pipe 16.18, but as necessary. Place a support stand between it and the top wall 10a 1^
Alternatively, an appropriate II.1 fixed member may be interposed between the rising gas and the radiator 80, and the fixed member may be connected to the radiator 80.
It may be supported by welding to the rising gas pipe 11.
遮蔽フード１０５は、前記容赦熱器８０の左右両側およ
び前後筒４ａの外４１１１面の下端部近傍１で垂下させ
て各放熱器の外１１１１１面の周囲を包０１イシて、放
熱器全体がｇ蔽フー）” １ ［Ｊ ５によって上方か
ら覆われた状態とする。この遮蔽フード１θ５を通気ダ
ク）１０６を介して変圧器室１υ０の隔壁１０１の換気
口１０６に接続する。The shielding hood 105 hangs down near the lower end 1 on both the left and right sides of the above-mentioned radiator 80 and on the outer 4111 surface of the front and rear cylinders 4a, and wraps around the outer 11111 surface of each radiator, so that the entire radiator is covered with g. The shielding hood 1θ5 is covered from above by a shielding hood 1θ5. This shielding hood 1θ5 is connected to the ventilation port 106 of the partition wall 101 of the transformer room 1υ0 via a ventilation duct 106.
この実施例では、変圧器巻線２０の高圧側ブッシング５
０および低圧４０１１ブッシング６Ｏｆｆ：変圧器タン
ク１０の対向する側面壁１０ｂ、１０ｃにそれぞれ設け
て、該側面壁１０：６．１［］ｃにそれぞれブスダクト
７［Ｊｂ、７０ｃをＪｉｍ 、１１７付け、放熱器８０
を変圧器タンク１０の上面壁１０ａＫ近接して配置して
いるが、変圧器室ＩＬｌ［Ｊの天井高さに余裕がある場
合は、ブッシングｓｏ 、６０およびブスダクト７０′
ｂ、７０Ｃを変圧器タンク１０の上面壁１０ａに取付け
て、放熱器８０は該ガスダクトの上方に配置してもよい
。In this embodiment, the high voltage side bushing 5 of the transformer winding 20
0 and low voltage 4011 bushings 6Off: are provided on the opposing side walls 10b and 10c of the transformer tank 10, respectively, and the bushings 7[Jb, 70c are attached to Jim, 117 on the side walls 10:6.1[]c, respectively, and heat dissipation is performed. vessel 80
are placed close to the top wall 10aK of the transformer tank 10, but if there is enough ceiling height in the transformer room ILl[J, bushings so, 60 and bus ducts 70'
b, 70C may be attached to the upper wall 10a of the transformer tank 10, and the radiator 80 may be placed above the gas duct.
上記のように放熱器８０を配置すると、変圧器タンク１
０内のＩＶ８縁ガス４０は、巻線２０および鉄心６０か
ら発生した損失熱が、伝達されて矢印で示すように上昇
ガス管１１内を」−昇して上部ヘッダー管１２に至り、
上部ヘソグー管１２から上部接続管８０ａを経て放熱器
８０に導かれる。放熱器８０の放熱面から熱を放散して
冷却された絶縁ガスは、下部接続管８０ｂを経て下部ヘ
ッダー管１６．１８に入ｐ１下降ガス管１５．１４内を
下降して変圧器タンク１υに戻る。When the radiator 80 is arranged as described above, the transformer tank 1
In the IV8 edge gas 40 in the 0, the loss heat generated from the winding 20 and the iron core 60 is transferred and rises in the rising gas pipe 11 as shown by the arrow and reaches the upper header pipe 12.
The heat is led from the upper hollow pipe 12 to the radiator 80 via the upper connecting pipe 80a. The insulating gas cooled by dissipating heat from the heat radiating surface of the radiator 80 passes through the lower connecting pipe 80b, enters the lower header pipe 16.18, descends in the p1 descending gas pipe 15.14, and flows into the transformer tank 1υ. return.
このようにして絶縁ガスが循環するときの自然対流速度
は、放熱器８０が変圧器タック１０の上方に配置されて
いることによって冷却中心高さと発熱中心高さとの差が
従来の変圧器よシもｌｄるかに大きくなっているため著
しく増加するから、巻線および鉄心の表面における絶縁
ガス１１すの熱伝達７−
率は大幅に増大する。The natural convection speed when the insulating gas circulates in this way is such that the difference between the height of the cooling center and the height of the heating center is similar to that of conventional transformers because the radiator 80 is placed above the transformer tack 10. The heat transfer rate of the insulating gas 11 on the surfaces of the windings and core increases significantly, since ld also increases significantly.
また、換気扇１０２によって遮蔽フード１０５に導入さ
れる変圧器室１００内の空気は、遮蔽フード１０５が各
放熱器８０の外側面の下端部近傍の周囲を包囲している
ため、矢印で示すように各放熱器８０の下端を通って遮
蔽フード１０５に導入されることになり、各放熱器８０
の放熱面の全部に導入空気を接触させることができる。In addition, since the shielding hood 105 surrounds the vicinity of the lower end of the outer surface of each radiator 80, the air inside the transformer room 100 introduced into the shielding hood 105 by the ventilation fan 102 flows as shown by the arrow. Each heat sink 80 will be introduced into the shielding hood 105 through the lower end of each heat sink 80.
The introduced air can be brought into contact with all of the heat dissipation surfaces of the
このため放熱器８０の空気１１１０における熱伝達率も
大幅に増大する。Therefore, the heat transfer coefficient in the air 1110 of the radiator 80 also increases significantly.
上記実施例では、放熱器Ｉ′ｉｆ／！縁ガスを自熱ガス
させる自冷式のものについて説明したが、自冷式に限ら
ず、第４１２１に示すよう（Ｃ下降ガス管１６゜１４に
ブロワ９０を挿入して絶縁ガスを強制循環させる方式の
ものについても同様に適用することができる。In the above embodiment, the heat sink I'if/! Although we have described a self-cooling type that turns the edge gas into self-heating gas, it is not limited to the self-cooling type. The same can be applied to other methods.
この発明は、上述したように、ガス絶縁変圧器の放熱器
を、変圧器タンクの上面壁の上方に配置し、各放熱器の
前後左右の外１１１１１面の下端部を上方から吊架した
遮蔽フードで包囲して、該遮蔽〕−８−
ドを変圧器室の換気口に連結する構成としている。As described above, this invention provides a shield in which the radiators of a gas insulated transformer are arranged above the upper wall of the transformer tank, and the lower ends of the front, rear, left, and right outer surfaces of each radiator are suspended from above. It is surrounded by a hood, and the shield is connected to the ventilation opening of the transformer room.
したがって、この発明によれば、絶縁ガス側の熱伝達率
の増大と併せて空気側の熱伝達率も増大するから、風冷
式放熱器を用いる快でもなく、自冷式放熱器によって風
冷式の場合とほぼ同等の冷却性能が発揮され、室内設置
用として好適な低験音変圧器が得られるだけでなく、同
一容量の変圧器については従来よりも放熱器の放熱面積
または設置数を減少することができ、自冷式変圧器の定
格容量として風冷式と同等の過負荷を供給することもで
きるから、自冷可能容量の限度を従来よりも冒ぐするこ
とが可能となる。Therefore, according to this invention, the heat transfer coefficient on the air side increases as well as the heat transfer coefficient on the insulating gas side. The cooling performance is almost the same as that of the conventional type, and it not only provides a low-noise transformer suitable for indoor installation, but also reduces the heat dissipation area or the number of radiators installed compared to conventional transformers of the same capacity. Since the rated capacity of the self-cooling type transformer can supply an overload equivalent to that of the wind-cooled type, it becomes possible to exceed the limit of the self-cooling capacity more than before.
また、この発明（Ｃよれば、放熱器の占める床面積が削
減され、変圧器全体の設置床面積が縮小するから、ビル
内や地下室等、天井高さの制限がない変圧器室であれば
、狭小な床面積の場所でも設置することができる効果が
ある。In addition, according to this invention (C), the floor area occupied by the radiator is reduced, and the installation floor area of the entire transformer is reduced. This has the advantage that it can be installed even in places with small floor space.
この発明は、いままで説明したガス絶縁変圧器（て限ら
ず、ガス絶縁リアクトルに適用することができるほか、
油入変圧器や？ＵＪ入りアクドルについても応用するこ
とができる。This invention can be applied not only to the gas insulated transformers (not limited to) described above, but also to gas insulated reactors.
An oil-immersed transformer? It can also be applied to Akudor with UJ.
第１図は、従来の自冷式ガス絶縁変圧器と変圧器室とを
示す縦断面図、第２図はその平面図、第３図は、この発
明の実施例を示す縦断面図、第４図は、強制イ狛環式ガ
ス絶縁変圧器についての実施例を示す一部縦断面図であ
る。
１０：変圧器タンク ＩＵａ：タンクの上面壁１０ｂ、
１０ｃ：タンクのイ１１１Ｊ而壁１１：上昇ガス管
１２：」一部ヘツダー管１３．１４：下降ガス′ｒ〒
１６．１８：上音ＩＳヘッダー管
８０：放熱器 １００：変圧器室１０６：換気口
１０５：遮蔽フード特許出願人 富士電機製造
株式会社
代理人 弁理士 森 哲 也弁理士 内
藤 嘉 昭
弁理士 清 水 正
弁理士 梶 山 情 是
１１−FIG. 1 is a longitudinal sectional view showing a conventional self-cooling gas insulated transformer and a transformer room, FIG. 2 is a plan view thereof, and FIG. 3 is a longitudinal sectional view showing an embodiment of the present invention. FIG. 4 is a partial longitudinal cross-sectional view showing an embodiment of a forced isolation ring type gas insulated transformer. 10: Transformer tank IUa: Tank top wall 10b,
10c: Tank A111J and wall 11: Rising gas pipe
12: Partial header pipe 13. 14: Downward gas 'r〒 16. 18: Upper sound IS header pipe 80: Heat radiator 100: Transformer room 106: Ventilation opening 105: Shielding hood Patent applicant Fuji Electric Manufacturing Co., Ltd. Agent Patent Attorney Tetsuya Mori Patent Attorney Yoshiaki Uchifuji Shimizu Regular Patent Attorney Jo Kajiyama Kore 11-
Claims (1)
器タンクの上面壁の上方に配置して、該放熱器を変圧器
タンクの上面壁から分岐した上昇ガス管と変圧器タンク
の側面壁から分岐した下降ガス管とにそれぞれ上部ヘッ
ダー管と下部ヘッダー管とを介して接続し、放熱器の外
側面の下端部まで垂下して放熱器の周囲を上方から包囲
する遮蔽フードを吊架し、該遮蔽フードを変圧器室外に
連通ずる換気口に連結したことを特徴とするガス絶縁変
圧器。In a gas insulated transformer installed indoors, a radiator is placed above the top wall of the transformer tank, and the radiator is connected to the rising gas pipe branched from the top wall of the transformer tank and from the side wall of the transformer tank. A shielding hood is connected to the branched descending gas pipes via an upper header pipe and a lower header pipe, respectively, and hangs down to the lower end of the outer surface of the radiator to surround the radiator from above, A gas insulated transformer characterized in that the shielding hood is connected to a ventilation port communicating with the outside of the transformer room.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21429082A JPS59104107A (en) | 1982-12-07 | 1982-12-07 | Gas insulated transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21429082A JPS59104107A (en) | 1982-12-07 | 1982-12-07 | Gas insulated transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59104107A true JPS59104107A (en) | 1984-06-15 |
| JPS646527B2 JPS646527B2 (en) | 1989-02-03 |
Family
ID=16653274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21429082A Granted JPS59104107A (en) | 1982-12-07 | 1982-12-07 | Gas insulated transformer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59104107A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0619092U (en) * | 1992-08-03 | 1994-03-11 | 株式会社クボタ | Syrup liquid level display for cup type beverage vending machines |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5241826A (en) * | 1975-05-12 | 1977-03-31 | Gec South Africa Pty | Cooled transformer |
| JPS5696815A (en) * | 1979-12-28 | 1981-08-05 | Kansai Electric Power Co Inc:The | Cooler for oil-immersed electric device |
-
1982
- 1982-12-07 JP JP21429082A patent/JPS59104107A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5241826A (en) * | 1975-05-12 | 1977-03-31 | Gec South Africa Pty | Cooled transformer |
| JPS5696815A (en) * | 1979-12-28 | 1981-08-05 | Kansai Electric Power Co Inc:The | Cooler for oil-immersed electric device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS646527B2 (en) | 1989-02-03 |
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